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Bell and Gossett series 100 noise

Just replaced B&G series 100 motor and coupling. On start up, runs quiet and boiler activates. Within a few seconds, get a noise in the area of the bearing assembly. I've ordered a new assembly and will be installing it. Any other possible causes for the noise?

Comments

  • GordyGordy Posts: 9,251Member
    Sounds like pebbles?
  • JohnNYJohnNY Posts: 2,193Member
    Coupler?
    For installations, troubleshooting, and private consulting services, find John "JohnNY" Cataneo here at :
    "72°F Mechanical, LLC"
    Or email John at [email protected]
    John is a professional Master Plumber, licensed by The Department of Buildings of The City of New York, and works extensively in NYC while consulting for clients in and out of state.
  • HVACNUTHVACNUT Posts: 1,911Member
    Didn't install a wet rotor pump?
  • IronmanIronman Posts: 4,907Member
    edited December 2018
    Why waste your time and money on that antiquated thing? Install a wet rotor circ like a Grundfos ups15-58 or Taco 007. Either will bolt right in place of the series 100 at 1/4 the cost.
    Bob Boan


    You can choose to do what you want, but you cannot choose the consequences.
  • unclejohnunclejohn Posts: 1,356Member
    Did the new motor come with new rubber mounts. If it did then yes it's the bearing assembly.
  • sheets105sheets105 Posts: 2Member
    Thank you everyone. The motor assembly is brand new as is the coupler. I've just noticed there are metal shavings all over the bearing assembly, so guessing there is a problem in there. Should have the new bearing assembly today, so we will see....
  • JUGHNEJUGHNE Posts: 5,468Member
    Those were and hopefully still are a great workhorse.
    I have repaired a few and learned that, (working for homeowners) when the bearing seal goes out it is time for an upgrade.
    Hopefully you get good years out of it.
    Just observe the oiling instructions, originally there were 3 points.
    Do not over oil the motor, if there are ports.
  • Wonderful circulator. There are many installed on my route and I have great respect for them.

    Youtube video helps, especially minute 5:00 when they show you how much oil to use.

    Often wrong, never in doubt.
  • HVACNUTHVACNUT Posts: 1,911Member
    > @Alan (California Radiant) Forbes said:
    > Wonderful circulator. There are many installed on my route and I have great respect for them.
    >
    > Youtube video helps, especially minute 5:00 when they show you how much oil to use.

    Gretzky is "The Geat One" but eventually he did have to hang up his skates.
    Nobody will ever top him even though the kids today are stronger, faster, more conditioned players. But Gretzky cant compete anymore.
  • GordyGordy Posts: 9,251Member
    Lol I remember when the coupler broke at 3:00am on my series 100 HV, and ceiling radiant. I thought the house was coming apart.........
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